From bd1eef9e049982028b78934f0de16c7e4369bdc2 Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Mon, 21 Nov 2022 16:58:26 -0800
Subject: added draw handling and player alternation

---
 ttt.c | 41 +++++++++++++++++++++++++++++++++--------
 1 file changed, 33 insertions(+), 8 deletions(-)

diff --git a/ttt.c b/ttt.c
index 9ca248d..843f6a3 100644
--- a/ttt.c
+++ b/ttt.c
@@ -11,7 +11,7 @@ void draw_board(int boardState[3][3]) {
 				line[c] = 'x';
 			}
 			else if(boardState[c][r] == 2) {
-				line[c] = 'y';
+				line[c] = 'o';
 			}
 			else {
 				line[c] = 'E';
@@ -81,12 +81,27 @@ int check_win(int boardState[3][3]) {
 int is_full(int boardState[3][3]) {
 	//if all squares full, return 1
 	//else return 0
-	
+	for(int r = 0; r < 3; r++) {
+		for(int c = 0; c < 3; c++) {
+			if(boardState[c][r] == 0) {
+				return 0;
+			}
+		}
+	}
+	return 1;
 }
-int is_drawn(int boardState[3][3]) {
-	//checks if board is full and if no win is on the board
-	//returns 1 if so, else 0
-
+int get_game_state(int boardState[3][3]) {
+	//0 if game in progress, 1 if x win, 2 if o win, 3 if drawn
+	int w = check_win(boardState);
+	if(w == 1 || w == 2) {
+		return w;
+	}
+	else if(is_full(boardState)) {
+		return 3;
+	}
+	else {
+		return 0;
+	}
 }
 int* user_input_pos() {
 	int* ip = malloc(2 * sizeof(int));
@@ -102,17 +117,27 @@ void clear_screen()
 }
 int main() {
 	int board[3][3] = { { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 } };
+	int turn = 0;
 	while(1) {
 		clear_screen();
 		draw_board(board);
 		int* tl = user_input_pos();
-		board[tl[0] - 1][3 - tl[1]] = 1;
+		board[tl[0] - 1][3 - tl[1]] = turn + 1;
 		free(tl);
-		if(check_win(board) != 0) {
+		int s = get_game_state(board);
+		if(s == 1 || s == 2) {
+			clear_screen();
+			draw_board(board);
 			printf("Someone won!");
 			printf("\n");
 			break;
 		}
+		if(s == 3) {
+			printf("Game is drawn!");
+			printf("\n");
+			break;
+		}
+		turn = !turn;
 	}
 	return 0;
 }
-- 
cgit v1.3.1